Skiving machine



'E. J. RAY

SKIVING MACHINE Oct. 17, 1933.

Filed Jan. 15, 1932 AME/Wm? J? aj is M m WM? Patented Oct. 17, 1933 UNITED STATES 1,930,489 SKIVING MACHINE Eugene J. Ray, Beverly, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J.,

a corporation of New Jersey Application January 15, 1932. Serial No. 586,817

9 Claims.

This invention relates to skiving machines and is herein illustrated as embodied in a machine for skiving the edges of pieces of upper leather in the manufacture of boots and shoes.

In certain instances it is desirable to produce upon the edge of a piece of leather a narrow, abrupt scarf, sucha scarf being desirable, for example, preparatory to finishing the edge of the piece by the application of a shrinking heat, by

means of a machine of the generaltype disclosed granted August 14, 1923 upon an application filed in the name of Joseph Fossa. Upper leather, which is the kind of leather to the skiving of which in the manner indicated above the present at the desired inclination to the edge of the knife while the leather is being fed through the machine in order to produce the desired result.

tion there is provided a plurality of stationary work supporting members adapted to engage the margin of the work on both sides thereof and to present the margin of the work uniformly at the desired abrupt angle to the edge of the knife. In the illustrated machine, the knife is of the rotary cylindrical type to which the work is fed by a rotary roll located partly within the knife; and two substantially fiat-faced stationary members, having spaced substantially parallel faces extending at an abrupt angle to the cutting locality of the knife, provide a channel through which the margin of the work is fed during the skiving operation. By thus maintaining the margin of the flexible work uniformly at a proper inclination to the cutting locality of the knife, a uniform abrupt scarf is produced.

This and other features of the invention including certain details of construction and combinations of parts will be described as embodied in an illustrated machine and pointed out in the appended claims.

Referring now to the accompanying drawing,

Figure 1 is a perspective on an enlarged scale of a portion of a piece of sheet material, such as According to one feature of the present inven- Figure 3 is a detail in perspective showing more particularly the edge gage and the sta'tionary margin-engaging members; and

Figure 4 is a front elevation of a portion of the 3 machine. in United States Letters Patent No. 1,464,504,

Before proceeding to a detailed description of the new construction, a brief description of what is old will be given. The machine comprises a cylindrical knife 5 which is rotated continuously about a horizontal axis, a driven feed roll 7 170 located partly within the knife, an edge-gage 9 held adjustably in positionby a thumb-screw 11, and a presser 13; This presser, as will presently appear, has a novel shape, but its mounting is old. It is mounted for adjustment in a path inclined to the horizontal and at right angles to the axis of rotation of the knife at the lower end of a carrier 15 having a slot 17 in its stem, said carrier being urged upwardly at all times by a compression spring 19 which rests with its lower end upon 80 a stationary abutment 21and with its upper end bears against the upper 'wallof the slot 17. An

' adjusting screw 23 provides means for moving the carrier 15 and presser foot 13 down into any desired position and holding it from rising so that the'presser is stationary during the operationof the machine. A clamping screw having a handle 25 holds the presser foot 13 rigidly in adjusted position on the carrier 15; The carrier 15 (Fig. 4) may be swung slightly to the right or left' about its rounded upper end by manipulating two abutment screws 27, 29 which'are threaded through walls of the stationary casing 31 in which the stem of the carrier is mounted. The machine, as thus far described, is or may be the same as the machine disclosed in United States Letters Patent No. 1,301,283, granted April 22, 1919 upon an application filed in the name of Albert Latham, to which reference is made for a complete description. It will be understood, however, that the work is fed away from the observer, as viewed in Figure 2, over a work support 33 past the knife. 5, the work passing above the knife and the chips or skivings beneath the knife.

The machine of the patent is adapted to produce a comparatively wide scarf which tapers gradually. In order to provide for the production of an abrupt scarf, an abutment 35 is adjustably mounted on the frame of the machine by means of a screw 3'? and a slot 39 in a sheet metal member to which the abutment 35 is fastened, said abutment having an upper face 41 which is abruptly inclined to the adjacent cutting locality of the knife 5, an angle in the neighborhood of sixty degrees being included between it and the adjacent substantially vertical face 43 of the edge gage 9. The presser 13 has formed upon it a substantially parallel face, the two faces defining a channel; abruptly inclined to the knife edge, through which the work 100 is fed with its edge against the gage. It will be noted that the work engaging faces of the presser and of the abutment are each of considerable extent :so that the margin of the work is engaged over a considerable area on both sides and is thus maintained firmly in the desired angular position with respect to the knife. In the operation of the machine the operator grasps-the body portion of the work, places the leading edge of the work in the angle between the face 41 of the abutment 35 and the face 43 of the gage and moves the work along as shown in Figure 3, thus aiding the feed roll in feeding the workthroug'h the, machine.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described having, in

combination, a rotary knife, a rotary feed roll, and a plurality. of stationary work supporting members adapted to engage the work on opposite sides thereof and to present the work as it passes through the channel between said members at an abrupt angle'to the operative locality of the knife.

2. A machine of the class described having, in combination, a rotary knife, a rotary feed roll,

and a plurality of stationary work supporting members having substantially flat faces adapted to engage the work on opposite sides thereof and to present the Work as it passes through the channel between said members at an abrupt angle to the operative locality of the knife.

3. A machine of the class described having, in combination, aknife, a feed roll, means for rotating the knife and roll, a stationary support for the margin of the work having a work-supporting face the extended surface of which intersects the adjacent portion of the edge of the knife at an abrupt angle, and a stationary presser having a work-engaging face which is substantially parallel to said first-named face, the two members forming between them a channel through which the material is fed to the knife.

4. A machine of the class described having, in combination, a knife, a feed roll, means for rotating the knife and roll, a stationary support for the margin of the work having a substantial- 1y fiat work-supporting face the plane of which intersects the adjacent portion of the edge of the knife at an abrupt angle, and a stationary presser having a Work-engaging face which is substantially parallel to said first-named face, the two members forming between them a channel through which the material is fed to the knife.

5. A machine of the class described having, in combination, a rotary cylindrical knife, a feed roll, and means for directing the margin of the work to the knife at an abrupt angle to the cutting locality of the knife and in a path substantially parallel to the axis of rotation of the knife, said means comprising a stationary support having a work-engaging surface of considerable extent and a presser having a similar work-engaging surface which is parallel to the first-named surface.

6. A machine of the class described having, in combination, a cylindrical knife, a feed roll, means for rotating the knifeand the roll, an edge guide for directing work to the knife, and a pair of stationary members for engaging the work on both sides .and presenting it to the knife, the faces of said members extending upwardly and away from the edge guide.

'7. A machine of the class described having, in combination, a cylindrical knife, a feed roll, meansfor rotating the knife and the roll, an edge guide for directing work to the knife, and a pair of stationary substantially flat-faced members for engaging the work on both sides and presenting it to the knife, the faces of said members extending upwardly and away from the edge guide.

8. A machine of the class described having, in combination a rotary cylindrical knife, an edge guide located in front of the knife and extending in a direction substantially parallel to the axis of rotation of the knife, a work support extending along the edge guide, the face of said support extending upwardly and away from the guide, and a presser-foot having a work-engaging face substantially parallel to that of the work support located between the edge guide .and the knife. I

9. A machine of the class described having, in combination, a rotary cylindrical knife, an edge guide located in front of the knife and extending in a direction substantially parallel to the axis of rotation of the knife, a stationary work support extending along the edge guide, the face of said support extending upwardly and away from the guide, and a presser-foot having a work-engaging face substantially parallel to that of the work support located between the edge guide and the knife.

' EUGENE J. RAY. 

